Go to administration (Click on your name at the top right of the screen).
Click on the "billing" tab.
Click on "update my informations".
N.B: If you update your credit card information, the system will retry making late payments (if applicable). It could therefore be that you have more than one payment that is transmitted on the same date.
Further information
In the same location, you will be able to see your payment history.
To learn more about subscriptions, click here.